package book;

class Student {
    String name="张三";
    String number="002";
    boolean  sex=true;
    int age=18;
    int i;

     void study(){
         int i=0;
         i++;
         this.i++;
        System.out.println("我在学习");
    }
    void sleep(){
         i++;
        System.out.println("我在睡觉");
    }

    public static void main(String[] args) {
        Student stu;
        stu=new Student();
        stu.study();
    }



}
